You can have only one HSA at a time, but you can move money between accounts or switch to a different one

Federal law limits you to a single Health Savings Account per year. If you try to open a second one while the first is active, the IRS will treat the excess contributions as taxable income and hit you with a 6% penalty tax on the overage each year it sits there. The rule exists because HSAs are tied to specific high-deductible health plans, and the IRS caps how much you can contribute annually based on your coverage type — individual, family, or self-only.

That said, you are not locked into one account forever. You can close an HSA and open a new one with a different bank or provider, or you can roll money from one account into another through a trustee-to-trustee transfer. The money itself stays yours; only the account structure changes. The timing matters, though — if you switch plans mid-year or change employers, the rules about when you can contribute shift, and mistakes can trigger penalties.

Key Takeaways

  • The IRS allows only one active HSA per person per year; opening a second one triggers a 6% penalty on the excess contribution amount.
  • You can move money from one HSA to another through a trustee-to-trustee transfer without tax or penalty, and the funds count toward your annual contribution limit.
  • If you change employers or health plans mid-year, you may be able to contribute to a new HSA for the remainder of that year, but only if you meet the coverage requirements for that period.
  • Closing an HSA does not force you to spend the money; you can keep it invested and withdraw it tax-free for medical expenses at any age.

How the one-HSA-per-year rule actually works

The IRS defines the limit as one HSA per individual per month. If you are covered by a high-deductible health plan on the first day of a month, you can contribute to an HSA for that month. If you have two HSAs open on the same day, both are considered active, and you have violated the rule.

The penalty is steep: 6% of the excess contribution amount, assessed every single year the money remains in the second account. So if you accidentally opened a second HSA with $2,000 in it and did not catch it for three years, you would owe 6% × $2,000 × 3 = $360 in penalties, plus income tax on the $2,000 itself. The IRS does not waive this penalty easily, even if the violation was unintentional.

The rule applies per person, not per household. If you and your spouse both have HSAs, that is legal — each of you has one account. But you cannot have two accounts yourself, even if you are married or have dependents.

Moving money between HSAs without penalty

If you want to switch HSA providers — say, from your employer's plan to a bank with lower fees or better investment options — you can move the money without triggering taxes or penalties. The move is called a trustee-to-trustee transfer, and it happens between the two financial institutions, not through your hands.

You contact your new HSA provider and give them the account details of your old one. The new provider then requests the funds directly from the old provider. The money never passes through your personal bank account, so it does not count as a withdrawal or a new contribution. You can do this transfer once per year per HSA, though some providers allow more frequent transfers if you are moving to a different institution entirely.

Do not withdraw the money yourself and deposit it into a new HSA. If you do, the IRS treats it as a distribution from the first account and a contribution to the second, which can trigger the one-HSA rule and create a tax mess. Always ask both providers to handle the transfer directly.

What happens if you change jobs or health plans mid-year

If you leave a job and your employer's HSA mid-year, you own that account and the money in it. You do not have to close it. You can keep it open indefinitely, even if you are no longer enrolled in a high-deductible plan, and continue to withdraw money tax-free for medical expenses.

If your new employer offers an HSA, you can open a new account with them — but only if you are covered by a high-deductible plan on the first day of the month you want to contribute. Your contribution limit for that year is prorated based on how many months you were covered. If you were covered for six months under the old plan and six months under the new one, you can contribute half the annual limit to each account, or you can contribute the full amount to one account if you meet the coverage requirements for the full year.

The key is that you cannot have both accounts active at the same time during the same month. If you leave your old job on June 15 and start a new job on June 20, you cannot contribute to both HSAs for June. You would need to choose which account to contribute to for that month, or wait until July to open the new account.

Closing an HSA does not mean spending the money

Some people think that closing an HSA means the money disappears or that they have to withdraw it all at once. Neither is true. When you close an account, you can transfer the balance to a new HSA, leave it in a savings account, or invest it elsewhere. The money is yours regardless of whether the account is active.

If you close an HSA and do not move the money to another HSA, you can still withdraw it tax-free for medical expenses at any point in the future — even decades later. You just need to keep receipts or documentation showing the expense was medical and occurred after you opened the account. This makes an HSA a powerful long-term savings tool: you can max it out every year, invest the money, and let it grow until you need it.

Inherited HSAs and family situations

If someone leaves you an HSA in their will, the rules depend on your relationship to them. If you are the spouse of the account holder, you can treat the HSA as your own and continue to contribute to it (subject to the one-HSA rule). If you are not the spouse, you must open a separate inherited HSA and withdraw the balance over time; you cannot merge it with your own account.

If you are married and both have HSAs, you each have one account. You cannot combine them into a single joint account, and you cannot exceed the family contribution limit by contributing the maximum to both accounts. The family limit applies to both of you together, so you need to coordinate how much each of you contributes.

How to avoid the one-HSA trap

Before opening a new HSA, confirm that your old one is closed or that you have completed a trustee-to-trustee transfer. Contact your old provider in writing and ask for confirmation that the account is closed and the balance transferred. Keep that confirmation.

If you change jobs, ask your new employer's benefits team whether the HSA they offer is a new account or a continuation of a previous one. Some employers use the same provider across multiple locations, and they may be able to roll your old balance into the new account without opening a second one.

When you file your taxes, the IRS sends you a Form 5498-SA showing HSA contributions. If you see contributions from two different HSAs in the same year, contact both providers immediately and ask which account should be closed. The sooner you fix it, the fewer years of penalties you will owe.

Frequently Asked Questions

Can I have an HSA and an FSA at the same time?

No. You cannot have both an HSA and a dependent care FSA in the same year. However, you can have an HSA and a limited-purpose FSA (one that covers only dental and vision expenses) at the same time, as long as you are enrolled in a high-deductible health plan.

What if I accidentally opened two HSAs and did not realize it?

Contact both providers immediately and close one account. File an amended tax return for any year you had both accounts open, and report the excess contribution to the IRS. You may owe the 6% penalty, but catching the error yourself and correcting it quickly reduces the chance of additional penalties or interest.

Can I have an HSA if I am on Medicare?

Once you enroll in Medicare Part A, you can no longer contribute to an HSA. If you already have one, you can keep it and withdraw money tax-free for medical expenses, but you cannot add new contributions. If you delay Medicare enrollment, you can continue contributing to an HSA until the month you enroll.

Do I have to use my HSA every year or lose the money?

No. HSAs do not have a "use it or lose it" rule like FSAs do. Money rolls over year to year indefinitely. You can let it accumulate and invest it for decades if you want, then withdraw it for medical expenses whenever you need it.

Can I transfer money from my spouse's HSA to mine?

No. HSAs are individual accounts, and you cannot transfer money between spouses. Each of you must maintain your own account. However, you can both contribute to your own accounts up to the family contribution limit combined, and you can coordinate how much each of you contributes.